306 Mr. J. E. Gray on Philippi's Zoological Notices* 



7. Pandora striata, Diet. Hist. Nat. xxv. 



8. Pandorina? equivalvis Philippi, Sicul. xviil. t. 1. f. 11. a.b.c. 

 Pandorina coruscans, Scacchi, Sp. Zool. 14. Costa. 



There is a second species very nearly allied to it, but which 

 differs in being much narrower and longer in proportion. Lij- 

 onsia is the oldest published name for the genus; Magdala 

 was the name that Dr. Leach first gave to it in his MSS., but 

 he aflerwards used Lyonsia. Brown, not satisfied with adopt- 

 ing Dr. Leaches earlier manuscript name, instead of Lyonsia, 

 has also added a new one, viz. Myatella. The shelly plate 

 which is found in the hinge of this genus in the most perfect 

 state of development, wa-, I believe, first described and figured 

 by Mr. Wood in his Conchology. This plate is peculiar to a 

 group of genera, which I think for several reasons, especially 

 on account of the general structure of the animals, should be 

 formed into a family separate from the Myadce, This family 

 contains the following genera : — 



Anatina=Auriscalpium, Schum. 



Cochlodesma=Anatina, §. 2. Turton. 



Periploma, 5'cAMm. = Osteodesma (part) Desk. 



Thracia=Odoncinetus, Costa. 



Lyonsia — Magdala and Myatella, Broivn = Osteodesma (part) 

 /)es^. = Pandorina, Scacchi. 



Myadora, Cray. = Pandora (species) iSoiyer%.=Anatina, Stutch- 

 bury, for Pandora brevis. Sow. 



Chamostrea, Roissy. = Cleidotherus Stutchbury, not Sowerby, as 

 quoted by Dr. Philippi. 



Myochama, Stutchbury, and probably Cardilia, Z)e6"^.=Hemicy- 

 clonosta, Desh. 



I described the animal of this genus in the first number of 

 my ^ Spicilegia Zoologica,^ when describing Lyonsia cuneata. 

 The species of the different genera oi Anatinidce pass very gra- 

 dually into each other, and I do not think that Lyofisia has 

 any affinity to either Pandora, Solenomya or Galeomma, the 

 latter having many characters in common with Gastf^ochana, 

 Lyonsia has the piece in the hinge both in the young and 

 adult state,; and it may be remarked, that all bivalve shells. 

 Pandora as well as the rest, have both a ligament and a car- 

 tilage, which is often called a double ligament. 



